4.
The Discourse on the Former
272.
"Monks, before my enlightenment, while I was still a Bodhisatta, not yet fully enlightened, it occurred to me:
'What indeed is feeling, what is the origin of feeling, what is the practice leading to the origin of feeling, what is the cessation of feeling, what is the practice leading to the cessation of feeling?
What is the gratification in feeling, what is the danger, what is the escape?'
It occurred to me, monks:
'There are these three feelings -
pleasant feeling, unpleasant feeling, neither-unpleasant-nor-pleasant feeling.
These are called feelings.
From the origin of contact is the origin of feeling.
Craving is the practice leading to the origin of feeling, etc.
Whatever is the removal of desire and lust, the abandoning of desire and lust regarding feeling.
This is the escape from feeling.'"
The fourth.